diff options
Diffstat (limited to 'drivers/misc')
-rw-r--r-- | drivers/misc/cxl/context.c | 11 | ||||
-rw-r--r-- | drivers/misc/cxl/cxl.h | 7 | ||||
-rw-r--r-- | drivers/misc/cxl/file.c | 6 |
3 files changed, 21 insertions, 3 deletions
diff --git a/drivers/misc/cxl/context.c b/drivers/misc/cxl/context.c index 4aa31a3fb448..51fd6b524371 100644 --- a/drivers/misc/cxl/context.c +++ b/drivers/misc/cxl/context.c @@ -34,7 +34,8 @@ struct cxl_context *cxl_context_alloc(void) /* * Initialises a CXL context. */ -int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master) +int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master, + struct address_space *mapping) { int i; @@ -42,6 +43,8 @@ int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master) ctx->afu = afu; ctx->master = master; ctx->pid = NULL; /* Set in start work ioctl */ + mutex_init(&ctx->mapping_lock); + ctx->mapping = mapping; /* * Allocate the segment table before we put it in the IDR so that we @@ -147,6 +150,12 @@ static void __detach_context(struct cxl_context *ctx) afu_release_irqs(ctx); flush_work(&ctx->fault_work); /* Only needed for dedicated process */ wake_up_all(&ctx->wq); + + /* Release Problem State Area mapping */ + mutex_lock(&ctx->mapping_lock); + if (ctx->mapping) + unmap_mapping_range(ctx->mapping, 0, 0, 1); + mutex_unlock(&ctx->mapping_lock); } /* diff --git a/drivers/misc/cxl/cxl.h b/drivers/misc/cxl/cxl.h index 7c05239359df..28078f8894a5 100644 --- a/drivers/misc/cxl/cxl.h +++ b/drivers/misc/cxl/cxl.h @@ -398,6 +398,10 @@ struct cxl_context { phys_addr_t psn_phys; u64 psn_size; + /* Used to unmap any mmaps when force detaching */ + struct address_space *mapping; + struct mutex mapping_lock; + spinlock_t sste_lock; /* Protects segment table entries */ struct cxl_sste *sstp; u64 sstp0, sstp1; @@ -599,7 +603,8 @@ int cxl_alloc_sst(struct cxl_context *ctx); void init_cxl_native(void); struct cxl_context *cxl_context_alloc(void); -int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master); +int cxl_context_init(struct cxl_context *ctx, struct cxl_afu *afu, bool master, + struct address_space *mapping); void cxl_context_free(struct cxl_context *ctx); int cxl_context_iomap(struct cxl_context *ctx, struct vm_area_struct *vma); diff --git a/drivers/misc/cxl/file.c b/drivers/misc/cxl/file.c index 378b099e7c0b..e9f2f10dbb37 100644 --- a/drivers/misc/cxl/file.c +++ b/drivers/misc/cxl/file.c @@ -77,7 +77,7 @@ static int __afu_open(struct inode *inode, struct file *file, bool master) goto err_put_afu; } - if ((rc = cxl_context_init(ctx, afu, master))) + if ((rc = cxl_context_init(ctx, afu, master, inode->i_mapping))) goto err_put_afu; pr_devel("afu_open pe: %i\n", ctx->pe); @@ -113,6 +113,10 @@ static int afu_release(struct inode *inode, struct file *file) __func__, ctx->pe); cxl_context_detach(ctx); + mutex_lock(&ctx->mapping_lock); + ctx->mapping = NULL; + mutex_unlock(&ctx->mapping_lock); + put_device(&ctx->afu->dev); /* |